Yon Sung, M.D.
NPI 1477629178 · Pulmonary Disease Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Yon Sung, M.D. is a Pulmonary Disease Physician provider in Stanford, CA (NPI 1477629178).
Provider details
- NPI number
- 1477629178
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 241178 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
699 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 115 | $133 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 86 | $10 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 69 | $164 |
| Test to Measure Expiratory Airflow and Volume94010 | 67 | $9 |
| Test to Measure Expiratory Airflow and Volume Changes Before and After Medication Administration94060 | 60 | $11 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 59 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Riociguatbrand: Adempas | 97 | — |
| Macitentanbrand: Opsumit | 85 | — |
| Sildenafil Citrate | 85 | 13 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 78 | 14 |
| Ambrisentan | 70 | — |
| Furosemide | 56 | 13 |
| Selexipagbrand: Uptravi | 50 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-27
- Last updated
- 2024-04-17
- Certified
- 2024-04-17
Frequently asked questions
- What is Yon Sung's NPI number?
- Yon Sung's National Provider Identifier (NPI) is 1477629178, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Yon Sung's specialty?
- Yon Sung is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Yon Sung located?
- Yon Sung's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Yon Sung's phone number?
- The practice phone number listed in the NPPES registry for Yon Sung is (650) 723-4000.
- Does Yon Sung accept Medicare?
- Yon Sung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Yon Sung's NPI active?
- Yes — Yon Sung's NPI (1477629178) is active in the NPPES registry as of the last update on 2024-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.